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Show HN: Markdown Viewer and Editor

https://kingsbridge-consultancy.com/md-viewer/
9•beerglass•1h ago
I built an online viewer and editor for .md files where the file stays on your machine. Free to use and code is available under MIT License here: https://github.com/hattray/markdown-editor

You can also install it as a Chrome/Edge app so that it works for files on your desktop by double-clicking.

Supports standard .md files with formatting, syntax-highlighting for code, table of contents, Mermaid diagrams, LaTeX via KaTex. Also supports exporting to .html, .pdf and .png.

Please give it a try and share your feedback for improvements.

Comments

jystervinou•25m ago
Hi,

Noob question, but how do you author a math equation? There are dedicated editors I guess?

Garlef•6m ago
There's a language for it (LaTeX).

It looks like this:

\int_{-\infty}^{\infty} e^{-x^2}\,dx = \sqrt{\pi}

Google Has Removed MV2 Extensions from the Chrome Web Store, Including UBO

https://webiterate.dev/google-removed-extensions-ublock-origin-108/
217•twapi•1h ago•175 comments

I turned my security cameras into an automatic bird identification system

https://jasontucker.blog/how-i-turned-my-security-cameras-into-an-automatic-bird-identification-s...
311•speckx•5h ago•87 comments

Playa Phone

https://playaphone.com/
441•cutoff•7h ago•170 comments

A walkable ASCII cyberpunk city in one HTML file [video]

https://www.youtube.com/watch?v=3YtygAx_C6A
159•keithcarolus•4h ago•28 comments

Show HN: Laser Graffiti

https://laser.consti.de
96•con•2d ago•21 comments

'Mad honey' that can stop your heart is being sold online

https://phys.org/news/2026-08-mad-honey-heart-sold-online.html
70•samizdis•3d ago•49 comments

Smartphone LED detects hidden cameras with AI

https://www.chosun.com/english/industry-en/2026/08/30/SBFXUIJQYZEARKP5T4FBAY25HQ/
117•geox•1d ago•31 comments

Terence Tao explains 6 essential mathematical concepts [video]

https://www.youtube.com/watch?v=OOMx2BHHWtE
126•matthewsinclair•1d ago•17 comments

Dwarf Fortress is getting the mother of all magic updates

https://www.rockpapershotgun.com/dwarf-fortress-is-getting-the-mother-of-all-magic-updates-extend...
244•Tomte•4d ago•94 comments

Autonomous (YC F25) Is Hiring Engineers

1•dkobran•1h ago

Apple caught off guard by AI demand for Mac Mini and Mac Studio

https://www.macrumors.com/2026/08/30/apple-unexpected-mac-mini-and-studio-demand/
250•thm•10h ago•278 comments

Tmp.0ut, Vol. 5

https://tmpout.sh/5/
113•kmstout•6d ago•5 comments

How we configured OpenTelemetry logs in Rails

https://www.sixpatterns.com/blog/how-we-configured-opentelemetry-logs-in-rails
10•__vivek•1h ago•1 comments

ChatGPT Work Tool and Skill Reference

https://codex-tool-reference.simonw.chatgpt.site/
163•ijidak•8h ago•49 comments

ravynOS: Pre-alpha open-source OS based on Darwin, FreeBSD, Apple open-source

https://ravynos.com/
141•Bluestein•6h ago•93 comments

Claude × retrocomputing: emulating a QIC-117 tape drive

https://dmitrybrant.com/2026/08/23/claude-x-retrocomputing-emulating-a-qic-117-tape-drive
8•zdw•1w ago•3 comments

I think the military commissary's freezers were hacked

https://signalandsilence.substack.com/p/i-think-someone-hacked-the-commissary
204•jcurbo•11h ago•120 comments

Reverse engineering my ADHD test

https://nullpt.rs/reverse-engineering-adhd-test
110•hazebooth•4d ago•34 comments

Since it was stripped of planetary status, Pluto’s defenders have been fighting

https://www.theguardian.com/science/2026/aug/31/forbidden-planet-was-plutos-2006-demotion-a-big-m...
38•ziofill•16h ago•107 comments

Internet centralization and the original sin of NAT

https://dreamstation.systems/personal/ntppost.html
157•robinpie•20h ago•115 comments

Launch HN: Almanac (YC S26) – AI that knows your company

https://usealmanac.com/
39•kushagrchitkar•7h ago•37 comments

The safest job from AI may be writing

http://muratbuffalo.blogspot.com/2026/08/the-safest-job-from-ai-may-be-writing.html
59•ilreb•4h ago•99 comments

Launch HN: Hebbian Robotics (YC S26) – Build scalable robotics data pipelines

https://github.com/Hebbian-Robotics/hflow
34•kstonekuan•7h ago•10 comments

Euphemisation of Taboo Areas [pdf]

https://ajmp.uwr.edu.pl/wp-content/uploads/sites/39/2023/12/10_Kleparski.pdf
29•Eridanus2•4d ago•1 comments

Show HN: We built the smallest dual-band aircraft tracker

https://pantsforbirds.com/the-worlds-smallest-dual-band-ads-b-receiver-module/
69•CoolNamesAllTkn•5d ago•20 comments

No country for mediocre mathematicians

https://garvvee.substack.com/p/no-country-for-mediocre-mathematicians
110•reasonableklout•1d ago•65 comments

Dimethyl Mercury Exposure Incident at MIT

https://twitter.com/andrew_n_carr/status/2093524390390694232
101•notRobot•2d ago•63 comments

'Stunning' percolation proof solves decades-old puzzle about phase transitions

https://www.quantamagazine.org/stunning-percolation-proof-solves-decades-old-puzzle-about-phase-t...
46•tzury•5h ago•16 comments

OpenShot 4.0 – Open-source video editor

https://www.openshot.org/blog/2026/08/30/openshot-40-record-edit-color-like-never-before/
511•metrofun•12h ago•120 comments

Breaking Claude Code Opus 5 Auto Mode

https://embracethered.com/blog/posts/2026/breaking-claude-code-opus-5-and-automode/
332•Recursing•14h ago•110 comments